Metal crack size recognizing used circular patch antenna

Abstract

Metal crack size recognition based on a circular patch antenna is presented in this article. The material under investigation is positioned onto the microstrip antenna's ground plane. Subsequently, antenna parameters such as return loss, VSWR, and resonance frequency shift are analyzed to ascertain their correlation with the length of cracks occurring within the metal. This study seeks to establish relationships between these antenna parameters and crack length, ultimately aiming to develop a crack detection methodology using the microstrip antenna. The testing results have revealed a significant correlation between the microstrip antenna parameters and the length of cracks within the metal material. Notably, the VSWR parameter of the antenna exhibits a correlation coefficient of 0.9881, while the resonance frequency shift displays a correlation coefficient of 0.9891.